hello i have an xf6 with no.7 draw mods would like just a tad bit longer draw would like to trade for a pair o8's of an xf6 all the xf draw mods will work but i think the xf-ss and ds the no's are different for draw for the xf6 no 7's are 27in. and no.8's are 28in. i need the 8's which is a 28in.draw mods............Ted